Telegraphy.



PATENTED SEPT. 26, 1905.

IE". W. JONES. TELEGRAPHY'.

APPLIOAUIION FILED APR.27, 1905" X 7% /NVEA/TOR IBYQATTOH. Q

PATENT OFFICE.

FRANCIS W. JONES, on NEW YORK, N. Y.

TELEGRAPHY.

Specification of Letters Patent.

Patented Sept. 26, 1905.

Application filed April 27, 1905. Serial No. 257,674.

The object of my invention is to provide means for repeating from aMorse circuit into the alternating-current-clrcult side, and vice versa,of a telegraph-line equipped with means for signaling by varying acontinuous current and simultaneously signaling by varying groups ofshort and rapidly-recurring alternating-current impulses.

I'provide an automatlc electromagnetictransmitting device and apolarized receivingrelay for the alternating-current circuit and anautomatic transmitter with a suitable relay for the Morse circuit, and Icause the relay of one circuit to control the transmitter in the othercircuit by means of a separate local circuit in each case. Thetransmitter in the simple Morse circuit is provided with an extracontact which operates in advance of the contact in the main circuit.This contact is in a local circuit controlling an electromagnet, whichin turn controls the break-points of the relay, the coils of which arein the simple Morse circuit.

The accompanying drawing illustrates my invention.

' m is a main telegraph-line having three stations (1, b, and 0. At eachstation there is a Morse key 22 and a neutral relay 21. At each stationthe Morse instruments are bridged by a branch circuit containing acondenser is, and suitable generators 19 and 20 are located at oppositeterminals of the line m with cooper-e ating polarities to line. Eachgenerator is bridged by a branch circuit containing a condenser la.Station a is also located on a second circuit m, which extends to adistant station (1. The line m is equipped with means for Morsesignaling, as described, and for simultaneously signaling by dividingrapidlyalternating impulses into groups. The appa ratus for this purposeat stations at and 0 are substantial duplicates.

' g is an alternating-current generator developing four hundredalternations per second.

, It is in a local circuit with one coil 51 of a transformer, the othercoil 52 of which is in I the main line m.

r is the receiving-relay, preferably of the polarized form, having aretracting-spring 54:. The coils of relay 1" are in the separate branchcircuit 55 in series with the condenser 53 and the break-point 56 of anelectromagnetic transmitter t, the other break-point 57 of which is incircuit with the generator 9. When transmitter t is operated, thecircuit of the relay 1' is opened when the circuit of the generator 9 isclosed, and vice versa. The closing of the contact at 57 renders thealternating impulses of 9 effective in the line on through thetransformer 51 52.

At station a and station 0? on the line 00 are sets of Morse apparatusconsisting of the relay 21 and key 22. In the circuitw at station a is arelay R in series with the break-points 60 of an electromagnetictransmitter. This transmitter has a magnet 62 in a local circuit 63,with a repeating-point 64 of the relay 0". The break-points of relay Rare in a local circuit 72, which includes the magnet 71 of thetransmitter t. I provide a magnet 80, which operates on thearmature-lever of the relay R to control the break-points 70. Thismagnet is in a local circuit 90, having two branches 91 and 92. Thebranch 91 is permanently closed. The branch 92 includes the break-points61, controlled by the transmitter-magnet 62, which in turn is controlledby the relay 1".

The operation of the apparatus may be described as follows: Stations 64,b, and 0 may exchange signals by the simple Morse code varyingcontinuous-current impulses, each impulse being coterminous with anelemental signal. Stations a and 0 may exchange signals by varying thelengths of groups of alternating impulses, all in a manner Wellunderstood. Stations 0 and cl may exchange signals, the first-namedemploying the alternating-current circuit including part of the line weand station d employing the line or circuit as, the operation beingaccomplished through the repeating apparatus at the station a. Whenstation coperates the relay r at station a, the circuit 63 is made andbroken at the points 64:. The magnet 62 responds, making and break ingcircuit 00 at the point 60. Preceding the break, however, there is abreak at the point 61, and the balance due to the two diflerentialcoil-windings inthecircuits 91' and 92 is broken, the circuit 91 beingeffective to magnetize the difierential magnet and control the circuitof the generator 0 at point 51, so

that the action of the key at 22 breaking the normally closed circuit incloses the normally open circuitthat is, the alternating-current circuitof the line at. The relay 1' at station 0 responds, and signals areinterchangeably transmitted. By means of the apparatus described I amenabled to relay or repeat from the normally open alternating-currentcircuit of the line on into the normally closed circuit of the line in,and vice versa.

What I claim, and desire to secure by Letters Patent, is

1. The combination of a telegraph-circuit, means for exchanging signalsbetween separated points by varying a continuous current and means forsimultaneously exchanging signals between separated points by varyinggroups of alternating-current impulses, said means including a.source ofalternating-current impulses with an electromagnetic transmitting deviceand a receiving instrument or relay inductively connected with said mainline; a second telegraph-circuit connecting separated points or stationshaving means for signaling by varying a continuous current, including arelay and an electromagnetic circuit-breaker in said circuit, a localcircuit including the break-points of the relay of the first circuit andthe magnet of the transmitter in the second circuit and a local circuitincluding the break-points of the relay in the second circuit and themagnet of the transmitter in the a1ternating-current circuit, and aholding-magnet acting on the armature of the receiving instrument in thesecond circuit, a local circuit therefor, and break-points in saidcircuit controlled by the relay in the first circuit.

2. The combination of two telegraph-circuits, means for exchangingsignals by varying a continuous current and means for simultaneouslyexchanging signals by varying groups of alternating-current impulses inthe first circuit and means for exchanging signals by varying acontinuous current in said second circuit, said means in each case,including an electromagnetic transmitting device and a relay, a localcircuitincluding the break-points of the relay of thealternating-current circuit and the transmitter-magnet of the secondcircuit, and a local circuit including the breakpoints of the relay ofthe second circuit and the transmitter-magnetof the alternating-currentcircuit, a holding-magnet for the armature-lever of the relay in thesecond circuit, a local circuit therefor, and break-points in saidcircuit controlled by the alternating-current relay.

3. The combination of two tclegra ih-circuits, means for exchangingsignals by varying a continuous current and means for simultaneouslyexchanging signals by varying groups of alternating-currcnt impulses in(he first circuit and means for exchangingsignals by varying acontinuous current in said second circuit, said means, in each case,including an electromagnetic transmitting device and a. relay, alocalcircuit including the breakmints of the relay of the altermlting-currentcircuit and the transmittcr-magnet of the second circuit and a localcircuit including the breakpoints of the relay of the second circuit andthe transmitter-magnet of thealternating-current circuit, and a magnetcontrolling the break-points ot' the relay in the second circuit, alocal circuit therefor, and break-points in said circuit controlled bythealternating-current relay.

4. The combination of two telegraph-circuits, means for exchangingsignals by varying a continuous current and means for simultaneouslyexchanging signals by varying groups of alternating-eurrent impulses inthe first circuit and means for exchangingsignals by varying acontinuous current in said second circuit, said means, in each case,including an electromagnetic transmitting device and a relay, a localcircuit including the break-points of the relay of thealternatiilgcurrent circuit and the transmitter-magnetof the secondcircuit and a local circuit inchiding the breakpoints of the relay ofthe second circuit and the transmitter-magnet of the alternating-current circuit, and a magnet controlling the break-points of the relay inthe second circuit, a local circuit therefor and break-points in saidcircuit controlled by the transmitier-magnet of the second circuit.

5. The combination of two telegraph-circuits, means for exchangingsignals by varying a continuous current and means for simultaneouslyexchanging signals by varying groups of alternating-current impulses inthe first circuit and means for exchanging signals by varying acontinuous current in said second circuit, said means in each case,including an electromagnetic transmitting device and a relay, a localcircuit including the break-points of the relay of thealternating-current circuit and the transmitter-magnet of the secondcircuit and a local circuit including the breakpoints of the relay ofthe second circuit and the transmitter-magnet of the alternating-currentcircuit, and a magnet controlling the break-points of the relay in thesecond circuit, a local circuit having two ln'anches, one of which isnormally closed and the second of which includes break-points of thetransmitter controlled by the relay in the alternating-current circuit.

6. The combination of two telegraph-circuits, one of which is equippedwith means for signaling by continuous-current impulses andsimultaneously with alternating-current 1mpulses,the circuit of thelatter being normally open, a second telegraph-line equipped with meansfor signaling by continuous-current impulses and means whereby signalsin the normally open alternating-current circuit are relayed or repeatedinto the normally closed continuous-current circuit, and means wherebysignals received on the'normally closed continuous-current circuit arerelayed or repeated into the normally open alternating-current circuit.

7. The combination at one station of two telegraph-lines, a normallyopen alternatingcurrent circuit on one line, a normally closedcontinuous-current circuit on the other line and means. for repeatingfrom one circuit to the other consisting of a relay and anelectromagnetic transmitter for each circuit, a local circuit includingthe back contact-stops of the closed-circuit relay and the magnet of theopen-circuit transmitter, a second local circuit including the frontcontact-stops of the opencircuit relay and the magnet of theclosedcircuit transmitter with a magnet controlling the break-points ofthe closed-circuit relay, a local circuit including the coils of saidmagnet and break-points operated by the relay of the open circuit.

FRANCIS W. JONES.

Witnesses:

THEODORE L. OUYLER, Jr., HARRY R. MONAHAN.

